<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>颜色单位</title>
    <style>
        /* 
        H(hue) 色相(0-360)
        S(saturation): 饱和度
        L(lightness): 亮度
        */
        div {
            width: 10rem;
            height: 10rem;
            background-color: hsl(169, 100%, 70%);
        }
    </style>
</head>

<body>
    我是在html中的文字
    <div></div>
</body>

</html>